About The three Principals of 5i have 70+ years combined experience in manufacturing including assembly, die casting, and TPS. 5i provides a high quality, reality based, common-sense resource to manufacturing firms by using the “5i System.” 5i also offers infrared services, on-site training, supplier development, and auditing. 5i focuses on an effective and efficient process in all offerings to maximize value for all clients. AdvertisementLike this:Like Loading...